Value Collection CAI503104000-100B Carriage Bolt 5/16-18 4in

Product Description

The VALUE COLLECTION CAI503104000-100B is a 5/16-18 carriage bolt with a 4-inch length under the head, manufactured from Grade 5 steel with a zinc-plated finish. The square neck design locks the bolt in place against the mating material during installation, preventing rotation as the nut is tightened. This bolt meets SAE J429 standards for mechanical and chemical properties, making it a reliable choice for structural fastening applications in trade and light industrial environments. It is sold in a minimum order quantity of 100 pieces per package.

This carriage bolt is suited for general structural assembly, wood-to-metal connections, and equipment fabrication where a flush, round head profile is required on the bearing surface. The zinc plating provides basic corrosion resistance for indoor and sheltered outdoor applications. Tradespeople in HVAC, plumbing, electrical, and general construction use carriage bolts like this for mounting brackets, equipment frames, and structural connections where a clean finished appearance is needed on one side of the joint.

Key Features

• 5/16-18 UNC thread for compatibility with standard inch-series nuts and tapped holes
• 4-inch length under head accommodates moderate material stack thickness
• Square neck prevents bolt rotation during nut tightening without requiring a wrench on the bolt head
• Grade 5 steel construction meets SAE J429 mechanical property requirements
• Zinc-plated finish provides corrosion resistance for sheltered and indoor installations

Compatibility

Designed as an OEM-style and general-use replacement carriage bolt for applications requiring a 5/16-18 UNC thread, 4-inch length under head, and square neck profile per SAE J429 specifications.

Installation Notes

Installation is typically performed by general tradespeople or mechanics using a standard wrench or socket on the nut side; the square neck seats into the material to hold the bolt stationary. Always ensure the mating hole is sized correctly to allow the square neck to engage and prevent spin-out. Verify material compatibility with zinc plating before use in fully exposed or high-moisture environments where additional corrosion protection may be required.